diff --git a/addons/account/views/report_invoice.xml b/addons/account/views/report_invoice.xml
index ea7591d6f82..8ceff6e6f56 100644
--- a/addons/account/views/report_invoice.xml
+++ b/addons/account/views/report_invoice.xml
@@ -3,7 +3,7 @@
     <data>
         <template id="report_invoice_document">
             <t t-call="web.external_layout">
-                <t t-set="o" t-value="o.with_context({'lang':o.partner_id.lang})" />
+                <t t-set="o" t-value="o.with_context(lang=o.partner_id.lang)" />
                 <div class="page">
                     <div class="row">
                         <div name="invoice_address" class="col-xs-5 col-xs-offset-7">
diff --git a/addons/mrp_repair/report/mrp_repair_templates_repair_order.xml b/addons/mrp_repair/report/mrp_repair_templates_repair_order.xml
index 727a01b4557..e2527e1d768 100644
--- a/addons/mrp_repair/report/mrp_repair_templates_repair_order.xml
+++ b/addons/mrp_repair/report/mrp_repair_templates_repair_order.xml
@@ -4,7 +4,7 @@
 <template id="report_mrprepairorder">
         <t t-set="o" t-value="doc"/>
             <t t-call="web.external_layout">
-                <t t-set="o" t-value="o.with_context({'lang': o.partner_id.lang})" />
+                <t t-set="o" t-value="o.with_context(lang=o.partner_id.lang)" />
                 <div class="page">
                     <div class="oe_structure"/>
 
diff --git a/addons/purchase/report/purchase_order_templates.xml b/addons/purchase/report/purchase_order_templates.xml
index c91660ba147..1e4a547313a 100644
--- a/addons/purchase/report/purchase_order_templates.xml
+++ b/addons/purchase/report/purchase_order_templates.xml
@@ -2,7 +2,7 @@
 <odoo>
 <template id="report_purchaseorder_document">
     <t t-call="web.external_layout">
-        <t t-set="o" t-value="o.with_context({'lang':o.partner_id.lang})"/>
+        <t t-set="o" t-value="o.with_context(lang=o.partner_id.lang)"/>
         <div class="page">
             <div class="oe_structure"/>
             <div class="row">
diff --git a/addons/purchase/report/purchase_quotation_templates.xml b/addons/purchase/report/purchase_quotation_templates.xml
index 79a1d82ab75..a2c2234bce1 100644
--- a/addons/purchase/report/purchase_quotation_templates.xml
+++ b/addons/purchase/report/purchase_quotation_templates.xml
@@ -2,7 +2,7 @@
 <odoo>
 <template id="report_purchasequotation_document">
     <t t-call="web.external_layout">
-        <t t-set="o" t-value="o.with_context({'lang':o.partner_id.lang})"/>
+        <t t-set="o" t-value="o.with_context(lang=o.partner_id.lang)"/>
         <div class="page">
             <div class="oe_structure"/>
 
diff --git a/addons/sale/report/sale_report_templates.xml b/addons/sale/report/sale_report_templates.xml
index 8f7c66edc1a..1a8a8eaa483 100644
--- a/addons/sale/report/sale_report_templates.xml
+++ b/addons/sale/report/sale_report_templates.xml
@@ -2,7 +2,7 @@
 <odoo>
 <template id="report_saleorder_document">
     <t t-call="web.external_layout">
-        <t t-set="doc" t-value="doc.with_context({'lang':doc.partner_id.lang})" />
+        <t t-set="doc" t-value="doc.with_context(lang=doc.partner_id.lang)" />
         <div class="page">
             <div class="oe_structure"/>
             <div class="row">
diff --git a/addons/stock/report/report_deliveryslip.xml b/addons/stock/report/report_deliveryslip.xml
index c889c0e1665..af7d57129f7 100644
--- a/addons/stock/report/report_deliveryslip.xml
+++ b/addons/stock/report/report_deliveryslip.xml
@@ -4,7 +4,7 @@
     <template id="report_delivery_document">
         <t t-call="web.html_container">
             <t t-call="web.external_layout">
-                <t t-set="o" t-value="o.with_context({'lang':o.partner_id.lang})" />
+                <t t-set="o" t-value="o.with_context(lang=o.partner_id.lang)" />
                 <div class="page">
                     <div class="row" name="customer_address">
                         <div class="col-xs-4 pull-right">
diff --git a/addons/stock/report/report_stockpicking_operations.xml b/addons/stock/report/report_stockpicking_operations.xml
index 98d850db36c..29203ed00ee 100644
--- a/addons/stock/report/report_stockpicking_operations.xml
+++ b/addons/stock/report/report_stockpicking_operations.xml
@@ -166,7 +166,7 @@
                                 </thead>
                                 <tbody>
                                     <tr t-foreach="o.entire_package_ids.sorted(key=lambda p: p.name)" t-as="package">
-                                        <t t-set="package" t-value="package.with_context({'picking_id':o.id})" />
+                                        <t t-set="package" t-value="package.with_context(picking_id=o.id)" />
                                         <td><span t-field="package.name"/></td>
                                         <td><img t-att-src="'/report/barcode/?type=%s&amp;value=%s&amp;width=%s&amp;height=%s' % ('Code128', package.name, 600, 100)" style="width:300px    ;height:50px"/></td>
                                         <td><span t-field="package.current_source_location_id"/></td>